From: Qipan Li <[email protected]> in SPI boot mode, romcode uses SPI controller to fetch data from NOR flash. Here we need to reset the hardware IP to restore its state.
Signed-off-by: Qipan Li <[email protected]> Signed-off-by: Barry Song <[email protected]> --- drivers/spi/spi-sirf.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/spi/spi-sirf.c b/drivers/spi/spi-sirf.c index 90dc05b..73a88b3 100644 --- a/drivers/spi/spi-sirf.c +++ b/drivers/spi/spi-sirf.c @@ -23,6 +23,7 @@ #include <linux/dmaengine.h> #include <linux/dma-direction.h> #include <linux/dma-mapping.h> +#include <linux/reset.h> #define DRIVER_NAME "sirfsoc_spi" @@ -647,6 +648,12 @@ static int spi_sirfsoc_probe(struct platform_device *pdev) int irq; int i, ret; + ret = device_reset(&pdev->dev); + if (ret) { + dev_err(&pdev->dev, "SPI reset failed!\n"); + return ret; + } + master = spi_alloc_master(&pdev->dev, sizeof(*sspi)); if (!master) { dev_err(&pdev->dev, "Unable to allocate SPI master\n"); -- 2.1.1 -- To unsubscribe from this list: send the line "unsubscribe linux-spi" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
